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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>特殊符号</title>
</head>
<body>
    <p>
        &lt;html权威指南&gt;
    </p>
    <p>
        你好&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;html
        <br>
        你好&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;html
    </p>
</body>
</html>

